1. Sara is researching phones and decides to create a weighted average to determ

Question

1. Sara is researching phones and decides to create a weighted average to determine the 'best.' She uses the following weights: 50% battery life, 30% cost, and 20% camera. She finds the following ratings out of 10 for each category on the Internet.

Compute the overall rating for each of the phones in the table. Express your answers rounded to the nearest tenth.
Based on the ratings that you computed, which phone is the 'best' ?

2. A student's final grade in chemistry is determined by the following weights:  

Use the following grades for a particular student:  

Express your answers rounded to the nearest tenth.
a). What is the average lab report grade for this student?  
b). What is the average quiz score?  
c). What is the student's overall grade in chemistry?  

Explanation / Answer

1)

50% battery life

30% cost

20% camera

For iphone = 8 * 0.5 + 5 * 0.3 + 6 * 0.2 = 6.7

for samsung = 4 * 0.5 + 6 * 0.3 + 8 * 0.2 = 5.4

for motorola = 9 * 0.5 + 10 * 0.3 + 8 * 0.2 = 9.1

Based on the rating Motorola is the best

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